<% form_tag request.path, :method => :get do %>

    <span class="linha_esquerda">
      <%= label_tag "Nome: " %><%= text_field_tag :nome,"" ,:size => 30 %>
    </span>

    <span class="linha_direita">
     <%= label_tag "Grande Area: " %> <%= select_tag 'grandearea[]', options_for_select(@grandesareas.map { |v| [v.nome,v.id] }), :include_blank => true%>
    </span>

  <span><%= submit_tag "Filtrar",:class => "botao"  %></span>
<% end %>